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Finding the Fourth Proportional to 6,390.77, 9,623.82 and 5,578.61

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Solution

The fourth proportional to 6,390.77, 9,623.82 and 5,578.61 is: 8,400.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.77 : 9,623.82 = 5,578.61 : x
  2. Step 2: Convert to fraction form
    6,390.77/9,623.82 = 5,578.61/x
  3. Step 3: Cross multiply
    6,390.77x = 9,623.82 × 5,578.61
  4. Step 4: Simplify right side
    6,390.77x = 53,687,511.29
  5. Step 5: Solve for x
    x = 53,687,511.29/6,390.77
  6. Step 6: Final answer
    x = 8,400.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.